/* startmarquee(一次滚动高度,速度,停留时间,图层标记); */
function startmarquee(lh, speed, delay, index) {
                var t;
                var p = false;
                var o = document.getElementById("marqueebox" + index);
                o.innerHTML += o.innerHTML;
                o.onmouseover = function() {
                    p = true
                }
                o.onmouseout = function() {
                    p = false
                }
                o.scrollTop = 0;

                function start() {
                    t = setInterval(scrolling, speed);
                    if (!p) o.scrollTop += 2;
                }

                function scrolling() {
                    if (o.scrollTop % lh != 0) {
                        o.scrollTop += 2;
                        if (o.scrollTop >= o.scrollHeight / 2) o.scrollTop = 0;
                    } else {
                        clearInterval(t);
                        setTimeout(start, delay);
                    }
                }
                setTimeout(start, delay);
            }